The goal of molecular biology in medical research is to understand the molecular mechanisms underlying health and disease. By studying the interactions among various biological molecules, such as DNA, RNA, and proteins, researchers aim to identify the genetic and biochemical causes of illnesses. This knowledge can lead to the development of targeted therapies, diagnostic tools, and vaccines. Molecular biology also plays a crucial role in personalized medicine, allowing treatments to be tailored to an individual's genetic makeup while improving patient outcomes and advancing overall health care.